Liquid crystal display device

a liquid crystal display and display device technology, applied in optics, non-linear optics, instruments, etc., can solve the problems of insufficient knowledge about the precise reason for the alignment of liquid crystals controlled by psa polymers, and achieve excellent display qualities, stabilized alignment of liquid crystals, and improved response speed

Active Publication Date: 2011-10-25
SHARP KK
View PDF13 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The saw-shaped polymer surface stabilizes liquid crystal alignment and improves response speed, reducing blurring and maintaining high contrast ratios, making it suitable for applications like in-car displays.

Problems solved by technology

The inventors noted that exact knowledge about why the alignment of liquid crystal is controlled by the PSA polymer has not been sufficiently solved yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystal display device
  • Liquid crystal display device
  • Liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0032]In the present Embodiment, a PSA treatment was performed as follows to produce a liquid crystal display panel in MVA mode.

[0033]A vertical alignment film (product of NISSAN CHEMICAL INDUSTRIES, LTD.) was formed on a surface on an array substrate and a surface on a counter substrate to prepare an empty panel. The array substrate includes a pixel electrode arranged in each pixel, and a thin film transistor which controls a voltage applied to the pixel electrode. The counter substrate includes a color layer in each pixel and a common electrode below the alignment film. The vertical alignment film is made of polyimide. In the present Embodiment, projective structures were formed between the common electrode and the alignment film on the counter substrate in a rib pattern, and the pixel electrode on the array substrate was provided with a slit.

[0034]Then, into the empty panel, negative liquid crystal (product of Merk & CO., saturated voltage: 6V) into which 0.3 wt % of polyfunction...

embodiment 2

[0035]A liquid crystal panel in Embodiment 2 was produced in the same manner as in Embodiment 1, except that instead of the slit-rib bent pattern for MVA, a slit stripe pattern for evaluation was formed on the array substrate and the counter substrate as the alignment control structure (both of the array substrate and the counter substrate are provided with slits).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
angleaaaaaaaaaa
angleaaaaaaaaaa
saturated voltageaaaaaaaaaa
Login to View More

Abstract

This invention provides a liquid crystal display device which can contribute to the stabilization of alignment of a liquid crystal and can improve the response speed. The liquid crystal display device comprises a pair of substrates and a liquid crystal layer held between the substrates. At least one of the pair of substrates has a polymer on its surface in contact with the liquid crystal layer. The surface shape of the polymer is in a substantially saw form as viewed from the cross-sectional direction of the substrate. The inclination azimuth of the inclination surface of the polymer is substantially the same as the liquid crystal alignment upon the application of the voltage. Preferably, the surface of the polymer has an approximately wedge shape as viewed from the vertical direction of the substrate, and the azimuth of the apex is approximately opposite to the liquid crystal alignment upon the application of the voltage.

Description

[0001]This application is the U.S. national phase of International Application No. PCT / JP2007 / 058274, filed 16 Apr. 2007, which designated the U.S. and claims priority to Japan Application No. 2006-218916, filed 10 Aug. 2006, the entire contents of each of which are hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a liquid crystal display device. More specifically, the present invention relates to a liquid crystal display device which is particularly preferably used to improve alignment controllability of a liquid crystal in Vertical Alignment mode.BACKGROUND ART[0003]A liquid crystal display device which controls alignment of a liquid crystal to perform display has advantages such as slim profile, lightweight, and low power consumption, in comparison to CRT that is a conventional standard display. Therefore, such a liquid crystal display device has been widely used in various electronics. Particularly in an application such as a household TV, u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(United States)
IPC IPC(8): G02F1/1333
CPCG02F1/133711G02F1/133788G02F1/1393G02F2001/133742G02F1/133742
InventorTASHIRO, KUNIHIROSASAKI, TAKAHIROMATSUMOTO, TOSHIHIRO
OwnerSHARP KK